[ww-bugs] Bug 2469: New: This had a rounding problem which confused my students.

[bugzilla-daemon at webwork.maa.org]

http://bugs.webwork.maa.org/show_bug.cgi?id=2469

           Summary: This had a rounding problem which confused my
                    students.
           Product: Problem libraries
           Version: unspecified
          Platform: PC
               URL: /opt/webwork/courses/math131fall2012/templates/Library
                    /ma122DB/set3/s3_1_44.pg_with_problemSeed=3972
        OS/Version: Linux
            Status: NEW
          Severity: enhancement
          Priority: P5
         Component: Library
        AssignedTo: jj at asu.edu
        ReportedBy: blake at math.wustl.edu
        Web browser ---
           version:


My seed: 3972

My fix.  The original:
   $pol=nicestring([$a[3], $a[2], $a[1], $a[0]], ['x^3', 'x^2', 'x', '']);

What I added/changed:

$rnumber = 1000000;
$b3 = int( $a[3]*$rnumber + .5 )/ $rnumber;
$b2 = int( $a[2]*$rnumber + .5 )/ $rnumber;
$b1 = int( $a[1]*$rnumber + .5 )/ $rnumber;
$b0 = int( $a[0]*$rnumber + .5 )/ $rnumber;
$pol=nicestring([$b3, $b2, $b1, $b0], ['x^3', 'x^2', 'x', '']);


It still wasn't perfect, but probably good enough.

Thanks,

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